Grain-grinder.



W. J. VERITY.

GRAIN GRINDER.

APPLICATION FILED 0017.12, 1914.

LEZZQQF, Patented Feb. 9, 1915.

"HE NORRIS PETERS 60.. PHOTO-LITHO.. WASHINGTONv D c.

6T6 lPhhhTT WILLIAM: JOHN VERITY, F BRANTFORI), ONTARIO, CANADA, ASSIGNOR 'IO NCASSEY- HARRIS COMPANY, LIMITED,

015 TOfiONTO, ONTARIO, CANADA.

GBAlN GfilNDIER.

Specification of Letters Patent.

Patented Feb. 9), 1915.

Application filed October 12, 1914. Serial No. 866,269.

To all whom it may concern:

Be it known that 1, WILLIAM J OHN VERITY,

of the city of Brantford, in the Province of Ontario, Canada, a subject of the King of Great Britain, have made certain new and useful Improvements in G'I'tLlIlrGI'lIldQlfS, of which the following is a specification. This invention relates to grinding machines of the type in which a stationary and a rotary grinding plate are employed, the latter being carried by a shaft longitudinally slidable to move the rotary plate to or from its operative position relative to the stationary plate, and my object is to devise simple and effective means for quickly mak ing the change and for adjusting the grind ing position of the plates. 6

I attain my object by means of the constructions hereinafter specifically described and illustrated in the accompanying drawings in which- Figure 1 is a side elevation of my improved grain grinder; Fig. 2 a longitudinal section of part of the same showing the grinder plates in cooperative position; Fig. 3 a similar view showing the grinder plates separated; Fig. 4: a face view of one of the grinder plates; Fig. 5 an enlarged cross section part of the same; and Fig. 6 is a side elevation of the movable slide for actuating the movable grinder plate.

In the drawings like numerals of reference indicate corresponding parts in the different figures. 1

1 is the frame of the apparatus suitably shaped to support the different parts.

2 is a hopper supported on the frame adapted to discharge into the screen 3 supported back and front by suitable hangers 4:. This screen will be agitated in the ordinary manner, but such means form no part of the present invention and a detailed description therefore is omitted. The screen 3 discharges into the hopper 5 opposite the end of the horizontal shaft 6. The hopper has an opening in its side communicating with the circular opening of astationary grinding plate 7 which is suitably supported on the framework.

Adjacent the hopper 5'the shaft 6 is journaled in the bearingS and has secured thereto the rotary grinding plate 9. The end of the shaft preferably projects through into the hopper 5 and has a feed screw 10 formed thereon adaptedto draw grain through into the circular opening of the stationary grindng disk 7. The opposite end of the shaft 6 is carried in the bearing 11, and intermediate the two bearings the shaft is provided with the driving pulley 12. The shaft also carrles the pulley 13 by means of a suitable belt which drives the pulley 14 on the shaft 15 which is used to effect the agitation of the screen 3. The shaft 6 is not only rotatable in its bearings but also movable endwise. The shaft is adapted to hold the rotatable disk in working position or release it to allow the latter to move out of working posit1on by means of the construction I now describe.

In the bearing 11 I provide a thrust block 16 which is movable lengthwise of the bearing. This thrust block preferably has an oil cup 17 formed on or secured thereto which extends up through a slot in the wall of the bearing so that the thrust block is freely movable lengthwise of the bearing. The oil cup communicates with a circular axial passage 18 formed in the thrust block extendingthrough its bearing face. Instead of having the thrust block bear directly against the end of the shaft 6 I provide the latter with a special bearing piece 19 of suitable material which is provided with a stem 20 inserted in a suitable hole bored in the end of the shaft. Between this hearing piece and the thrustblock I place a washer 21 also provided with an axial hole. The oil from the oil cup is thus led forward to flow between the contacting surfaces of the washer, the bearing piece and the thrust block. The thrust block is moved to push the rotary disk toward its operative position by the following mechanism. The slide 22 is located in the outer end of the bearing 11 which slide is adapted to engage the outer end of the thrust block 16. This slide is moved to operate the thrust block by means of a cam 23 which is formed on or secured to the spindle 2 1 journaled transversely of the shaft 6, and engages the lip 32 formed on the slide. When the spindle is rotated to throw the cam into the position shown in Fig. 2 the grinding plates are in operative position. When the cam is in the position shown in Fig. 3 the grinding plates are not allowed to operate. To facilitate and assist the separation I employ the spring actuated slide 25 provided with the yoke 26 adapted to engage behind the collar 27 secured to the shaft 6. It is necessary not only to be able to release the rotary plate from its operative position, but also to adjust the rotary plate relative to the stationary plate when the two are in operative position. For this purpose I provide an adjustable engagement between the slide 22 and the thrust block 16. The adjustment comprises the screw 28 threaded through the slide and engaging the thrust block with its inner end. A lock nut 29 is also provided which is adapted to j am against the end of the slide. The grinding Y faces of the plates are preferably formed as shown in Figs. 4 and 5. Each plate as usual is formed in sections. The sections are provided with ribs 30 which are not actually radial of the plate but tangential to a small circle concentric with the circumference of the plate. Cross ribs 31 are formed between the ribs 80 having their outer edges slightly below the edges of the ribs 30 as shown in Fig. 5. To protect the plates from injury in case large hard objects accidentally get between them, I provide a special point of weakness in the means for holding the movable plate to its work. This is preferably formed by transversely scoring the lip 32 so that when an overstrain comes upon the lip the outer part will break off and will remain behind while the slide 22 moves back to release the movable plate.

' From the above description it will be seen that I have devised a grain grinder which will satisfactorily attain the objects of my invention as set out in the preamble to this specification.

What I claim as my invention is 1. In a grain grinder the combination of a stationary grinding plate; a rotary plate cooperating therewith; a shaft to which said rotary plate is secured; a bearing in which said shaft is slidable longitudinally as well as rotatable; 'a thrust block slidable but not rotatable in said bearing and engaging the 'end of the shaft; a slide longitudinally movable but non-rotatable in said bearing and adapted to engage said thrust block; a lip on said slide; a spindle j ournaled transversely of said bearing; a cam on said spindle adapted to engage said lip to move the thrust block and slide the shaft to bring the rotary plate into operative position.

2. In a grain grinder the combination of a stationary grinding plate;a rotary plate cooperating therewith; a shaft to which said rotary plate is secured; a bearing in which said shaft is slidable longitudinally as well as rotatable; a thrust block slidable but not rotatable in said bearing and engaging the end of the shaft; a slide longitudinally movable but non-rotatable in said bearing and adapted to engage said thrust block; a lip on said slide; a spindle journaled transversely of said bearing; a cam on said spindle adapted to engage said lip to move the thrust block and slide the shaft to bring the rotary plate into operative position; and adjustable engaging means between the slide and thrust block whereby the position of said thrust block relative to said spindle may be varied as desired.

3. In a grain grinder the combination of a stationary grinding plate; a rotary plate cooperating therewith; a shaft to which said rotary plate is secured; a bearing in which said shaft is slidable longitudinally as well as rotatable; a thrust block slidable but not rotatable in said bearing and engaging the end of the shaft; a slide longitudinally movable but non-rotatable in said bearing and adapted to engage said thrust block; a lip on said slide; a spindle journaled transversely of said bearing; a cam on said spindle adapted to engage said lip to move the thrust block and slide the shaft to bring the rotary plate into operative position; and a screw threaded through said slide forming an adjustable engagement between the slide and thrust block whereby the position of said thrust block relative to said spindle may be varied as desired.

4. In a grain grinder the combination of a stationary grinding plate; a rotary plate cooperating therewith; a shaft to which said rotary plate is secured; a bearing in which said shaft is slidable longitudinally as well as rotatable; a slide adapted to move said shaft to move the rotary plate out of operative position; a lip on said slide; a spindle journaled transversely ofsaid bearing; a cam on said spindle adapted to engage said lip to move the slide and consequently the shaft to bring the rotary plate into operative position.

5. In a grain grinder the combination of a stationary grinding plate; a rotary plate cooperating therewith; a shaft to which said rotary plate is secured; a bearing in which said shaft is slidable longitudinally as well as rotatable; a slide adapted to move said shaft to move the rotary plate out of operative position; a lip on said slide; a spindle journaled transversely of said bearing; a cam on said spindle adapted to engage said lip to move the slide and consequently the shaft to bring the rotary plate into operative position; and a screw threaded through said slide adapted to adjust the engagement between said slide and shaft.

6. In a grain grinder the combination of a stationary grinding plate; a rotary plate cooperating therewith; a shaft to which said rotary plate is secured; a bearing in which said shaft is slidable longitudinally as well as rotatable; a thrust block slidable but not rotatable in said bearing and engaging the end of the shaft; a slide longitudinally movable but non-rotatable in said bearing and adapted to engage said thrust block; a lip on said slide having a line of Weakness Dated at Brantford this sixth day of Auformed across the same; a spindle journaled gust A. D. 1914.

transversely of said bearing; a cam on said WVILLIAM JOHN VERITY. spindle adapted to engage said lip to move In the presence of- 5 the thrust block and slide the shaft to bring ELsIE WILMoT,

the rotary plate into operative position. STANLEY E. BUCK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

